ARVADA, Colo. One of the driest winters on record has Colorado facing elevated wildfire danger and is leading some homeowners across the state to turn to automated exterior sprinkler systems for protection. And insurance experts continue to stress the need to be prepared and adopt multiple fire mitigation steps.Kersten and Hunter Bishop call Arvada home. They told Denver7 Investigates that they decided to invest in Frontline Wildfire Defense aft…